Locomotive Audio Copperline

The Copperline is a utility unit meant to be placed between a microphone and preamp or between two line-level devices. It's loaded with two channels of valuable features, including a 5-position attenuator, 5-position high pass filter, mute, vintage load, polarity, and never-before-seen variable voltage phantom power. Whether aiding your vintage mic preamps with modern features or joining two line-level devices, the Copperline will help you creatively alter your signal and shape your sound.

Variable Voltage Phantom Power

Change the character and performance of your phantom-powered microphone with a single knob.

With Copperline's all-new Variable Voltage Phantom Power, you will discover how the voltage sent to your microphone can affect its behavior. Never before has a device been designed to purposely alter phantom power voltages in search of new character in an old microphone! After all, we’re more than just engineers; we’re artists with the never-ending desire to find new combinations to get a unique sound. So different that nobody will know how we achieved it. That’s part of the fun in audio engineering - happy accidents.

US and EU parcels ship via UPS, ETA 1-7 working days from pickup day zero. That also applies to most locations worldwide.

All shipments are fully insured.

Bigger shipments requiring pallets or custom made crates ship to US, CA, JP, CN, AU and other outside of EU locations via DHL Air Freight, ETA is normally approx. 7-14 working days from pickup day zero.

Big shipments inside EU ship via different freight companies, recently mostly via ACE Logistics. Freight forwarders can use different courier companies for deliveries to final destinations.

Palletising and crating time can vary depending on the size of the shipment and packaging queue. We pack all our shipments with great care.

You are most welcome to pick your order up yourself from our Retrosonic Pro Audio showroom, studio and warehouse in Tallinn, Estonia.

We ship worldwide – contact us for a personal shipping quote or any other questions.

VAT (Value Added Tax) can be deducted if you have a company with a valid EU VAT number or if you're based outside of the EU. Non-EU buyers pay all and any import tax and duty as regulated by their local customs.